Air filter, or similar article



FIG. 1 is a plan view of one face of the air filter showing our design;

FIG. 2 is an edge elevational view thereof looking toward the right side in FIG. 1, the opposite edge being identical;

FIG. 3 is an edge elevational view looking toward the lower edge thereof in FIG. 1, the opposite edge being identical; and

FIG. 4 is a plan view of the opposite face thereof. 

The ornamental design for an air filter, or similar article, substantially as shown. 